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CALENDAR(1) FreeBSD General Commands Manual CALENDAR(1)
NAMEcalendar -- reminder service
SYNOPSIScalendar [-Anum] [-a] [-Bnum] [-Dmoon|sun] [-d] [-Ffriday]
[-fcalendarfile] [-llongitude] [-tdd[.mm[.year]]]
[-UUTC-offset] [-Wnum]
DESCRIPTION
The calendar utility checks the current directory for a file named
calendar and displays lines that fall into the specified date range. On
the day before a weekend (normally Friday), events for the next three
days are displayed.
The following options are available:
-Anum Print lines from today and the next num days (forward, future).
-a Process the ``calendar'' files of all users and mail the results
to them. This requires super-user privileges.
-Bnum Print lines from today and the previous num days (backward,
past).
-Dmoon|sun
Print UTC offset, longitude and moon or sun information.
-d Debug option: print current date information.
-Ffriday
Specify which day of the week is ``Friday'' (the day before the
weekend begins). Default is 5.
-fcalendarfile
Use calendarfile as the default calendar file.
-llongitude
Perform lunar and solar calculations from this longitude. If
neither longitude nor UTC offset is specified, the calculations
will be based on the difference between UTC time and localtime.
If both are specified, UTC offset overrides longitude.
-tdd[.mm[.year]]
For test purposes only: set date directly to argument values.
-UUTC-offset
Perform lunar and solar calculations from this UTC offset. If
neither UTC offset nor longitude is specified, the calculations
will be based on the difference between UTC time and localtime.
If both are specified, UTC offset overrides longitude.
-Wnum Print lines from today and the next num days (forward, future).
Ignore weekends when calculating the number of days.
FILE FORMAT
To handle calendars in your national code table you can specify
``LANG=<locale_name>'' in the calendar file as early as possible.
To handle the local name of sequences, you can specify them as:
``SEQUENCE=<first> <second> <third> <fourth> <fifth> <last>'' in the cal-
endar file as early as possible.
The names of the following special days are recognized:
Easter Catholic Easter.
Paskha Orthodox Easter.
NewMoon The lunar New Moon.
FullMoon The lunar Full Moon.
MarEquinox The solar equinox in March.
JunSolstice The solar solstice in June.
SepEquinox The solar equinox in September.
DecSolstice The solar solstice in December.
ChineseNewYear The first day of the Chinese year.
These names may be reassigned to their local names via an assignment like
``Easter=Pasen'' in the calendar file.
Other lines should begin with a month and day. They may be entered in
almost any format, either numeric or as character strings. If the proper
locale is set, national month and weekday names can be used. A single
asterisk (``*'') matches every month. A day without a month matches that
day of every week. A month without a day matches the first of that
month. Two numbers default to the month followed by the day. Lines with
leading tabs default to the last entered date, allowing multiple line
specifications for a single date.
The names of the recognized special days may be followed by a positive or
negative integer, like: ``Easter+3'' or ``Paskha-4''.
Weekdays may be followed by ``-4'' ... ``+5'' (aliases for last, first,
second, third, fourth) for moving events like ``the last Monday in
April''.
By convention, dates followed by an asterisk are not fixed, i.e., change
from year to year.
Day descriptions start after the first <tab> character in the line; if
the line does not contain a <tab> character, it is not displayed. If the
first character in the line is a <tab> character, it is treated as a con-
tinuation of the previous line.
The calendar file is preprocessed by a limited subset of cpp(1) inter-
nally, allowing the inclusion of shared files such as lists of company
holidays or meetings. This limited subset consists of #include#ifndef#endif and #define. If the shared file is not referenced by a full path-
name, calendar(1) searches in the current (or home) directory first, and
then in the directory /usr/share/calendar. Empty lines and lines pro-
tected by the C commenting syntax (/* ... */) are ignored.
Some possible calendar entries (<tab> characters highlighted by \t
sequence)
LANG=C
Easter=Ostern
#include <calendar.usholiday>
#include <calendar.birthday>
6/15\tJune 15 (if ambiguous, will default to month/day).
Jun. 15\tJune 15.
15 June\tJune 15.
Thursday\tEvery Thursday.
June\tEvery June 1st.
15 *\t15th of every month.
2010/4/15\t15 April 2010
May Sun+2\tsecond Sunday in May (Muttertag)
04/SunLast\tlast Sunday in April,
\tsummer time in Europe
Easter\tEaster
Ostern-2\tGood Friday (2 days before Easter)
Paskha\tOrthodox Easter
FILES
calendar file in current directory.
~/.calendar calendar HOME directory. A chdir is done into this
directory if it exists.
~/.calendar/calendar
calendar file to use if no calendar file exists in
the current directory.
~/.calendar/nomail do not send mail if this file exists.
The following default calendar files are provided in /usr/share/calendar:
calendar.all File which includes all the default files.
calendar.australia Calendar of events in Australia.
calendar.birthday Births and deaths of famous (and not-so-famous)
people.
calendar.christian Christian holidays. This calendar should be
updated yearly by the local system administrator so
that roving holidays are set correctly for the cur-
rent year.
calendar.computer Days of special significance to computer people.
calendar.croatian Calendar of events in Croatia.
calendar.dutch Calendar of events in the Netherlands.
calendar.freebsd Birthdays of FreeBSD committers.
calendar.french Calendar of events in France.
calendar.german Calendar of events in Germany.
calendar.history Everything else, mostly U.S. historical events.
calendar.holiday Other holidays, including the not-well-known,
obscure, and really obscure.
calendar.judaic Jewish holidays. The entries for this calendar
have been obtained from the port deskutils/hebcal.
calendar.music Musical events, births, and deaths. Strongly ori-
ented toward rock 'n' roll.
calendar.newzealand Calendar of events in New Zealand.
calendar.russian Russian calendar.
calendar.southafrica Calendar of events in South Africa.
calendar.usholiday U.S. holidays. This calendar should be updated
yearly by the local system administrator so that
roving holidays are set correctly for the current
year.
calendar.world Includes all calendar files except for national
files.
COMPATIBILITY
The calendar program previously selected lines which had the correct date
anywhere in the line. This is no longer true, the date is only recog-
nized when it occurs at the beginning of a line.
SEE ALSOat(1), cpp(1), mail(1), cron(8)HISTORY
A calendar command appeared in Version 7 AT&T UNIX.
NOTES
Chinese New Year is calculated at 120 degrees east of Greenwich, which
roughly corresponds with the east coast of China. For people west of
China, this might result that the start of Chinese New Year and the day
of the related new moon might differ.
The phases of the moon and the longitude of the sun are calculated
against the local position which corresponds with 30 degrees times the
time-difference towards Greenwich.
The new and full moons are happening on the day indicated: They might
happen in the time period in the early night or in the late evening. It
does not indicate that they are starting in the night on that date.
Because of minor differences between the output of the formulas used and
other sources on the Internet, Druids and Werewolves should double-check
the start and end time of solar and lunar events.
BUGS
The calendar internal cpp does not correctly do #ifndef and will discard
the rest of the file if a #ifndef is triggered. It also has a maximum of
50 include file and/or 100 #defines and only recognises #include, #define
and #ifndef.
There is no possibility to properly specify the local position needed for
solar and lunar calculations.
FreeBSD 10.2 April 6, 2013 FreeBSD 10.2